Over-speed, rough loads and hard landing detection system
First Claim
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1. A controller for indicating an overload condition has occurred during aircraft operation for at least one aircraft tire, wheel and/or at least one aircraft landing gear, said controller configured to:
- receive at least one input indicative of at least one of a load placed on the at least one tire and/or at least one landing gear or an angular velocity of the at least one tire;
determine, based on the at least one input, if the at least one tire or landing gear corresponding to the at least one tire has exceeded a prespecified threshold; and
based on the determination, provide an output indicative an overload condition of the at least one tire or the landing gear corresponding to the at least one tirewherein the threshold is a velocity threshold, andwherein the controller, to determine if the at least one tire or landing gear has exceeded the prespecified threshold, is configured to;
use an accelerometer to determine a rate of vertical descent of an aircraft at a time of aircraft touchdown;
compare the determined rate of vertical descent to the prespecified threshold; and
conclude a hard landing condition has occurred for the at least one tire and/or landing gear corresponding to the at least one tire if the rate of vertical descent of the aircraft exceeds the prespecified threshold.
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Accused Products
Abstract
A system, apparatus and method provide a means for indicating an overload condition has occurred during aircraft operation. The occurrence of an overload condition is automatically determined and an indication output thereof. Based on the indication received by the cockpit, avionics, maintenance, etc., further action may be taken to correct the effects of the overload condition on the tires and/or landing gear.
8 Citations
13 Claims
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1. A controller for indicating an overload condition has occurred during aircraft operation for at least one aircraft tire, wheel and/or at least one aircraft landing gear, said controller configured to:
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receive at least one input indicative of at least one of a load placed on the at least one tire and/or at least one landing gear or an angular velocity of the at least one tire; determine, based on the at least one input, if the at least one tire or landing gear corresponding to the at least one tire has exceeded a prespecified threshold; and based on the determination, provide an output indicative an overload condition of the at least one tire or the landing gear corresponding to the at least one tire wherein the threshold is a velocity threshold, and wherein the controller, to determine if the at least one tire or landing gear has exceeded the prespecified threshold, is configured to; use an accelerometer to determine a rate of vertical descent of an aircraft at a time of aircraft touchdown; compare the determined rate of vertical descent to the prespecified threshold; and conclude a hard landing condition has occurred for the at least one tire and/or landing gear corresponding to the at least one tire if the rate of vertical descent of the aircraft exceeds the prespecified threshold. - View Dependent Claims (2)
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3. A method of indicating an overload condition has occurred for at during aircraft operation for at least one aircraft tire, wheel and/or at least one aircraft landing gear, comprising:
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determining at least one of a load placed on the at least one tire or an angular velocity of the at least one tire; determining, based on at least one of the load or the angular velocity, if the at least one tire or landing gear corresponding to the at least one tire has exceeded a prespecified threshold; based on the determination, providing an output indicative of an overload condition of the at least one tire or the landing gear corresponding to the at least one tire determining a first angular velocity of the at least one tire during a first time period after aircraft touchdown; determining a second angular velocity of the at least one tire during a second time period after aircraft touchdown, the second time period occurring subsequent to the first time period; and calculating a radius of the at least one tire during the first time period based on the first angular velocity and the second angular velocity. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. An aircraft landing gear system for indicating an overload condition comprising:
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a controller for indicating an overload condition has occurred during aircraft operation for at least one aircraft tire, wheel and/or at least one aircraft landing gear, said controller configured to; receive at least one input indicative of at least one of a load placed on the at least one tire and/or at least one landing gear or an angular velocity of the at least one tire; determine, based on the at least one input, if the at least one tire or landing gear corresponding to the at least one tire has exceeded a prespecified threshold; and based on the determination, provide an output indicative an overload condition of the at least one tire or the landing gear corresponding to the at least one tire; the controller having a plurality of inputs; at least one aircraft landing gear and at least one tire associated with the at least one landing gear; and a wheel speed sensor operatively coupled to one of the plurality of inputs, wherein the at least one aircraft tire comprises a wheel speed sensor configured to provide data indicative of a velocity of the at least one tire. - View Dependent Claims (12)
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13. A method of indicating an overload condition has occurred for at during aircraft operation for at least one aircraft tire, wheel and/or at least one aircraft landing gear, comprising:
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determining at least one of a load placed on the at least one tire or an angular velocity of the at least one tire; determining, based on at least one of the load or the angular velocity, if the at least one tire or landing gear corresponding to the at least one tire has exceeded a prespecified threshold; based on the determination, providing an output indicative of an overload condition of the at least one tire or the landing gear corresponding to the at least one tire; wherein the threshold is a velocity threshold, and determining if the at least one tire or landing gear has exceeded the prespecified threshold by a method comprising; using an accelerometer to determine a rate of vertical descent of an aircraft at a time of aircraft touchdown; comparing the determined rate of vertical descent to the prespecified threshold; and concluding a hard landing condition has occurred for the at least one tire and landing gear corresponding to the at least one tire in response to the rate of vertical descent of the aircraft exceeding the prespecified threshold.
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Specification